Method and system for measuring cardiac tissue health based on DV/DTmin of a depolarization wave within a cardiac electrogram
AssigneeNeucures Inc.
InventorRobert L. Lux
Life of this patent
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Abstract
A method for determining cardiac tissue health based on a depolarization wave within an EGM is disclosed. The method includes computing a first derivative with respect to time (DV/DT) of the EGM, determining extrema for the first derivative, establishing a value DV/DTMIN based on the extrema and mapping the value DV/DTMIN to cardiac tissue.
Claims12
A method for determining cardiac tissue health based on a depolarization wave within an electrogram (EGM), comprising:
- receiving, by a processor, an electrogram (EGM), wherein the EGM comprises at least one of a unipolar EGM and a bipolar EGM;
- removing, by the processor, noise from the EGM when the noise is above a predefined threshold;
- computing, by the processor, a first derivative with respect to time (DV/DT) of the EGM;
- determining, by the processor, extrema for the first derivative, wherein the extrema comprises at least a maxima and a minima;
- based on the extrema, establishing, by the processor, a value DV/DTMIN by selecting at least one of
- the minima as the value for DV/DTMIN for the unipolar EGM;
- the maxima and the minima for the bipolar EGM as the value for DV/DTMIN based on a ratio;
- and
- mapping, by the processor, the value DV/DTMIN to cardiac tissue.
A system for determining cardiac tissue health based on a depolarization wave within an electrogram (EGM), comprising:
- a memory;
- and
- one or more processors coupled to the memory programmed with executable instructions to:
- receive an electrogram (EGM), wherein the EGM comprises at least one of a unipolar EGM and a bipolar EGM;
- remove noise from the EGM when the noise is above a predefined threshold;
- compute a first derivative with respect to time (DV/DT) of the EGM;
- determine extrema for the first derivative, wherein the extrema comprise at least a maxima and a minima;
- based on the extrema, establish a value DV/DTMIN by selecting at least one of
- the minima as the value for DV/DTMIN for the unipolar EGM;
- the maxima and the minima for the bipolar EGM as the value for DV/DTMIN based on a ratio;
- and
- map the value DV/DTMIN to cardiac tissue.
A non-transitory computer readable storage medium, having stored thereon, a set of computer-executable instructions that causes a computer to perform the method comprising:
- receiving an electrogram (EGM), wherein the EGM comprises at least one of a unipolar EGM and a bipolar EGM;
- removing noise from the EGM when the noise is above a predefined threshold;
- computing a first derivative with respect to time (DV/DT) of the EGM;
- determining extrema for the first derivative, wherein the extrema comprise at least a maxima and a minima;
- based on the extrema, establishing a value DV/DTMIN by selecting at least one of
- the minima as the value for DV/DTMIN for the unipolar EGM;
- the maxima and the minima for the bipolar EGM as the value for DV/DTMIN based on a ratio;
- and
- mapping the value DV/DTMIN to cardiac tissue.
Dependencies are inferred from the claim text.